Further updates for Windows NSI script

.. to add in MingW32 dlls and dependencies
Version String Error

.. in aboutdialog.cpp, accidentally commited earlier
   this month in prep for V3.0 release candidates.
Fix CP chart SEGV on delete ride

.. referencing combo box when in range mode.
Merge pull request #566 from amtriathlon/master

Enabled translation of BatchExportDialog
Fix repaint of intervals when one changes
Enabled translation of GroupBy labels and formats in RideNavigator